Classic Apple Crisp with Buttery Cinnamon Oat Topping

Classic apple crisp is a comforting homemade dessert made with tender sliced apples and a buttery cinnamon oat topping. As it bakes, the apples soften into a sweet, cinnamon-spiced filling while the topping turns golden and crisp.
This old-fashioned apple crisp is baked in a 9×13 casserole dish, making it a wonderful dessert to share with family and friends. The filling combines apples, lemon juice, sugar, flour, and cinnamon, while the crumb topping brings together rolled oats, brown sugar, flour, and butter for a satisfying contrast of textures.
The recipe takes about 30 minutes to prepare and 45–50 minutes to bake. Serve it warm on its own or with a scoop of vanilla ice cream for a classic dessert pairing.

Why You’ll Love This Apple Crisp Recipe

• Classic homemade flavor: Cinnamon, apples, and brown sugar create a familiar, comforting dessert.
• Buttery crisp topping: Rolled oats and butter form a golden crumb topping with plenty of texture.
• Tender apple filling: Thinly sliced apples bake with sugar, cinnamon, and lemon juice until soft and bubbling.
• Great for sharing: The recipe uses a 9×13 casserole dish, making it suitable for family meals and gatherings.
• Easy to customize: Choose Granny Smith, Honeycrisp, Golden Delicious, or a combination of firm apples.
• Make-ahead friendly: Leftovers can be refrigerated or frozen according to the storage instructions.

Ingredients You’ll Need

For the Apple Crisp Filling

• Firm, crisp apples: Use 4 pounds, or about 11–12 medium apples. Granny Smith, Honeycrisp, and Golden Delicious are suitable choices.
• Lemon juice: Two tablespoons help coat the sliced apples and balance their sweetness.
• Granulated sugar: Three-quarters of a cup sweetens the filling. Tart apples may need additional sugar.
• All-purpose flour: Three tablespoons help thicken the apple juices. For a gluten-free option, the recipe suggests using 1½ tablespoons of cornstarch.
• Ground cinnamon: Adds warm spice to the apples.

For the Crumb Topping

• All-purpose flour: Forms the base of the crumb topping. A 1:1 gluten-free flour blend can be used as an alternative.
• Light brown sugar: Adds sweetness and a rich brown sugar flavor.
• Granulated sugar: Provides additional sweetness and contributes to the crisp topping.
• Ground cinnamon: Gives the topping a warm, spiced flavor.
• Fine sea salt: Balances the sweetness.
• Unsalted butter: Use one cup at room temperature for the topping, plus another ½ tablespoon to grease the baking dish.
• Old-fashioned rolled oats: Add texture and help create the classic crisp topping.

How to Make Apple Crisp

Step 1: Prepare the Baking Dish

Preheat the oven to 375°F. Generously butter a 9×13 casserole dish with ½ tablespoon of butter.

Step 2: Peel and Slice the Apples

Peel, core, and thinly slice the apples to about ¼-inch thickness. You should have approximately 12 cups of sliced apples.
Place the apples in a large bowl, squeeze the lemon juice over them, and toss to coat.

Step 3: Make the Apple Filling

In a separate bowl, stir together the granulated sugar, flour, and cinnamon.
Sprinkle this mixture over the sliced apples and toss until the apples are evenly coated. Transfer the filling to the prepared casserole dish and spread it into an even layer.

Step 4: Prepare the Crumb Topping

In a large bowl, combine the flour, rolled oats, light brown sugar, granulated sugar, cinnamon, and salt.
Add the diced room-temperature butter. Use your hands to work the butter into the dry ingredients until pea-sized crumbs form throughout the mixture.

Step 5: Add the Topping

Spread the crumb topping evenly over the apples, covering the filling as much as possible.

Step 6: Bake Until Golden and Bubbling

Bake at 375°F for 45–50 minutes. The topping should be golden and crisp, and the apple juices should bubble around the edges. Pierce the apples with a knife to check that they are tender.

Step 7: Serve

Once baked, serve the apple crisp warm or allow it to cool slightly before scooping into portions. Add vanilla ice cream if desired.

Tips for the Best Homemade Apple Crisp

• Choose firm apples: Golden Delicious, Granny Smith, and Honeycrisp all work well. You can also combine different varieties.
• Adjust the sugar to your apples: If you use tart Granny Smith apples, the recipe suggests increasing the filling sugar to one cup or adjusting it to taste.
• Slice apples evenly: Aim for slices around ¼ inch thick so they cook evenly.
• Work the butter into small crumbs: Mix until pea-sized pieces form throughout the topping for the intended crisp texture.
• Spread the topping evenly: Covering the apples with a consistent layer helps the topping brown as the filling cooks.
• Check for tenderness: The crisp is ready when the topping is golden, the juices are bubbling, and the apples are tender when pierced with a knife.

Best Apples for Apple Crisp

The type of apple you choose affects the sweetness and tartness of the finished dessert.

• Granny Smith: A tart option that contrasts with the sweet topping. You may want to increase the sugar.
• Honeycrisp: A firm, crisp apple that works well in baked desserts.
• Golden Delicious: Another recommended choice for this recipe.
• A combination of apples: Mixing varieties lets you balance tart and sweet flavors.
  Whichever apples you choose, use firm, crisp fruit as recommended in the recipe.

Frequently Asked Questions

What temperature should I bake apple crisp at?

Bake it at 375°F for 45–50 minutes, until the topping is golden and crisp and the filling bubbles around the edges.

How do I know when apple crisp is ready?

Look for a golden topping, bubbling juices around the edges, and apples that are tender when pierced with a knife.

Can I make this apple crisp gluten-free?

The recipe provides two substitutions: use 1½ tablespoons of cornstarch instead of the flour in the apple filling, and use a 1:1 gluten-free flour blend in the crumb topping. Make sure your other ingredients, including oats, are suitable for your dietary needs.

How should I store leftover apple crisp?

Cover and store leftovers at room temperature for up to one day or refrigerate for three to five days. You can also freeze the crisp for up to three months and thaw it overnight in the refrigerator.

How do I reheat apple crisp?

Reheat it uncovered at 350°F until warmed through.

Can I use tart apples?

Yes. Granny Smith apples are one of the recommended varieties. For tart apples, increase the sugar in the filling to one cup or adjust it to taste.

A Classic Dessert for Any Gathering

This classic apple crisp combines soft cinnamon apples with a buttery oat topping for a homemade dessert that is simple, comforting, and easy to share. Use firm apples, prepare the crumb topping until it forms small buttery pieces, and bake until the filling bubbles and the top turns golden. Serve warm for a cozy finish to a family meal.

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